Gas storage material

Abstract

To provide a gas storage material and gas separation system capable of regulating the storage pressure and release pressure of a gas. A gas storage material which has two cubic lattice-shaped organometallic complexes, wherein the two organometallic complexes form an interpenetrating structure in which one apex portion of a unit cell of one of the organometallic complexes is positioned in a space inside one unit cell of the other organometallic complex.

1 .- 9 . (canceled) 
     
     
         10 . A gas storage material which has two cubic lattice-shaped organometallic complexes, comprising
 organometallic complexes comprising at least two types of metal atom, wherein the two organometallic complexes form an interpenetrating structure in which one apex portion of a unit cell of one of the organometallic complexes is positioned in a space inside one unit-cell of the other organometallic complex.   
     
     
         11 . The gas storage material according to  claim 10 , wherein in each of the organometallic complexes,
 if an apex portion of a unit cell is positioned at the center of an orthogonal coordinate system comprising an x-axis, a y-axis and a z-axis,   and if 2 metal atoms are present at the center,   then a planar lattice structure is formed such that four dicarboxylic acid ion ligands form a paddle wheel type unit in the x-axis direction and y-axis direction relative to the two metal atoms, and   two or four pyridine derivative ligands are coordinated as pillar ligands from the z-axis direction relative to the two metal atoms and a cubic lattice structure is formed in such a way that the planar lattice structure is layered in the z-axis direction.   
     
     
         12 . The gas storage material according to  claim 11 , wherein the dicarboxylic acid ion ligands are represented by any of formulae (1a) to (1f) below:
 Chemical Formula 1   
       
         
           
           
               
               
           
         
       
     
     
         13 . The gas storage material according to  claim 11 , wherein the pyridine derivative ligands are represented by any of formulae (2a) to (2d) below: 
       
         
           
           
               
               
           
         
       
     
     
         14 . The gas storage material according to  claim 10 , further comprising two metals selected from the group consisting of Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn as the metal atoms. 
     
     
         15 . The gas storage material according to  claim 14 , wherein the metal atoms are Cu and Zn. 
     
     
         16 . A storage container comprising the gas storage material according to  claim 10 , wherein a gas is stored having an explosion limit of 0.2 MPa at 25° C. in a non-oxidizing atmosphere. 
     
     
         17 . The storage container according to  claim 16 , wherein the gas is acetylene. 
     
     
         18 . A gas storage system which stores one or more gases, and which comprises
 the gas storage material according to  claim 10 ,   a pressurization and depressurization mechanism for increasing or decreasing the pressure of the gas(es), and   a control unit for controlling the pressure of the pressurization and depressurization mechanism, wherein   the storage pressure of the gas(es) into the gas storage material and the release pressure from the gas storage material are controlled by altering the content ratio of the metal atoms that form the organometallic complexes of the gas storage material.